dm: dts: ls1021a-twr: Enable DSPI2 on LS1021ATWR

Erratum A-008022 has been fixed on LS1021A Rev2.0.
So we can use DSPI2 now, this patch enable DSPI2
in dts for LS1021ATWR.

Signed-off-by: Yuan Yao <yao.yuan@freescale.com>
Reviewed-by: Jagan Teki <jteki@openedev.com>

arch/arm/dts/ls1021a-twr.dts

@@ -17,6 +17,7 @@
 		enet0_sgmii_phy = &sgmii_phy2;
 		enet1_sgmii_phy = &sgmii_phy0;
 		spi0 = &qspi;
+		spi1 = &dspi1;
 	};
 };
 
@@ -33,6 +34,21 @@
 	};
 };
 
+&dspi1 {
+	bus-num = <0>;
+	status = "okay";
+
+	dspiflash: at26df081a@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "spi-flash";
+		spi-max-frequency = <16000000>;
+		spi-cpol;
+		spi-cpha;
+		reg = <0>;
+	};
+};
+
 &i2c0 {
 	status = "okay";
 };